Other readers tipped packaging materials, such as wooden pallets, cartons and plastic stretch-wrap, as useful leading indicators.
另外有读者认为包装物（像木托盘、纸箱和塑料薄膜）是有用的先行指标。
More down-to-earth readers tipped packaging materials, such as wooden pallets, cartons and plastic stretch-wrap, as useful leading indicators.
还有更多务实的读者推荐木头托盘、纸箱、塑料拉伸缠绕膜等包装材料作为实用的先导指标。
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